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surveillance

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noun sur·veil·lance \sər-ˈvā-lən(t)s also -ˈvāl-yən(t)s or -ˈvā-ən(t)s\

Simple Definition of surveillance

  • : the act of carefully watching someone or something especially in order to prevent or detect a crime

Source: Merriam-Webster's Learner's Dictionary

Full Definition of surveillance

  1. :  close watch kept over someone or something (as by a detective); also :  supervision

Examples of surveillance in a sentence

  1. government surveillance of suspected terrorists

  2. The bank robbery was recorded by surveillance video cameras.



Origin and Etymology of surveillance

French, from surveiller to watch over, from sur- + veiller to watch, from Old French veillier, from Latin vigilare, from vigil watchful — more at vigil


First Known Use: 1802


Medical Dictionary

surveillance

play play play
noun sur·veil·lance \sər-ˈvā-lən(t)s also -ˈvāl-yən(t)s or -ˈvā-ən(t)s\

Medical Definition of surveillance

  1. :  close and continuous observation or testing <serological surveillance>—see immunological surveillance






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